ASTM D7759/D7759M-21

This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation: D7759/D7759M − 21
Standard Guide for
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Nuclear Surface Moisture and Density Gauge Calibration
This standard is issued under the fixed designation D7759/D7759M; the number immediately following the designation indicates the
year of original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last
reapproval. A superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope* 1.7 This guide describes two mathematical processes by
which the gauge measurement precision may be computed or
1.1 Procedure A—This guide describes the process and
measured.
objectiveofformulatingthemathematicalrelationshipbetween
the density system count of a nuclear surface moisture and
1.8 This guide offers guidance for developing and reporting
density gauge and the corresponding wet density value of the
estimates of uncertainties in measurements made with gauges
density standard upon which the density system response was
that have undergone calibration and verification.
observed.
1.9 All observed and calculated values shall conform to the
1.2 Procedure B—This guide describes the process and
guide for significant digits and rounding established in Practice
objective of comparing the wet density measured by a nuclear
D6026.
surface moisture and density gauge and the corresponding
1.10 Units—The values stated in either SI units or inch-
density value of the density standard upon which the density
pound units are to be regarded separately as standard. The
system response was observed.
values stated in each system are not necessarily exact equiva-
1.3 This guide describes the process and objective of the
lents; therefore, to ensure conformance with the standard, each
verification of the measurements of a nuclear surface moisture
system shall be used independently of the other, and values
and density gauge.
from the two systems shall not be combined.Within the text of
1.4 Procedure A—This guide describes the process and
this standard, SI units appear first followed by the inch-pound
objectiveofformulatingthemathematicalrelationshipbetween
(or other non-SI) units in brackets.
the water content system count of a nuclear surface moisture
1.10.1 Reporting of test results in units other than SI shall
and density gauge and the corresponding water mass per unit
not be regarded as nonconformance with this guide.
volume value of the water content standard upon which the
1.11 This standard does not purport to address all of the
water content system response was observed.
safety concerns, if any, associated with its use. It is the
1.5 Procedure B—This guide describes the process and
responsibility of the user of this standard to establish appro-
objective of comparing the water mass per unit volume
priate safety, health, and environmental practices and deter-
measured by a nuclear surface moisture and density gauge and
mine the applicability of regulatory limitations prior to use.
the corresponding water mass per unit volume of the corre-
1.12 This guide offers an organized collection of informa-
sponding water content standard upon which the water content
tion or a series of options and does not recommend specific
system response was observed.
course of action. This document cannot replace education or
1.6 This guide describes the process and objective of the
experienceandshouldbeusedinconjunctionwithprofessional
verification of the measurements of a nuclear surface moisture
judgment. Not all aspects of this guide may be applicable in all
and density gauge.
circumstances. This ASTM standard is not intended to repre-
sent or replace the standard of care by which the adequacy of
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a given professional service must be judged, nor should this
This practice is under the jurisdiction of ASTM Committee D18 on Soil and
Rock and is the direct responsibility of Subcommittee D18.08 on Special and
document be applied without consideration of a project’s many
Construction Control Tests.
unique aspects. The word “Standard” in the title of this
Current edition approved May 1, 2021. Published June 2021. Originally
document means only that the document has been approved
approved in 2012. Last previous edition approved in 2014 as D7759–14. DOI:
through the ASTM consensus process.
10.1520/D7759-21.
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
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D7759/D7759M − 21
1.13 This international standard was developed in accor- 3.2.5 prepared standards, n—density or water
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